Surface Representation of the Urinary Bladder and Bio-mechanical Analysis by Linear Dynamic Model

The biomechanical characterization of Urinary Bladder is essential to create new therapeutic tools as artificial tissue replacement or electrical stimulators. In this paper, we applied a linear model, the so-called viscoelastic Voigt’s model to calculate the viscosity and elasticity in three regions of a bladder under the experimental condition of tensile stresses. Additionally, we acquired the tridimensional surface of urinary bladders by a cloud of points that were processed in digital format. Viscosity and elasticity are represented on the surface reconstruction. Three bovine bladders were processed with an average sample viscosity of 89.33 × 10⁻⁶ Ns/mm² and average elasticity of 1.3 × 10⁻³ N/mm, the isotropic condition was evaluated. The digital representation includes a cloud of points of 9 × 10⁶ elements on average. These results are the base of a future computational simulation platform.